Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH

刘建; 颜慧成; 唐薇; 朱文彬; 许伟阳; 唐广波

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Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH

更新时间：2026-01-21

- Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH
- Special Steel Vol. 33, Issue 5, Pages: 51-53(2012)
- 作者机构：
  
  1. 湖南华菱湘潭钢铁有限公司,湘潭,411101
  2. 钢铁研究总院国家连铸技术工程研究中心,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：25 March 2012，
  
  Online First：10 October 2022，
  
  Published：10 October 2012
- 稿件说明：
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刘建, 颜慧成, 唐薇, et al. Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH[J]. Special Steel, 2012, 33(5): 51-53.
DOI：

刘建, 颜慧成, 唐薇, et al. Effect of Carbon Macro-Segregation of Casting Bloom on Banded Structure of Rolled Bar of Gear Steel 20CrMnTiH[J]. Special Steel, 2012, 33(5): 51-53. DOI：

摘要

20CrMnTiH钢Φ130 mm圆钢的生产工艺流程为120 t BOF-LF-VD-300 mm×430 mm坯连铸-连轧。不同连铸工艺(过热度15～30℃

电磁搅拌0～400 A)生产的连铸坯和轧材的宏观碳偏析表明

较高的过热度和过强的结晶器电磁搅拌会加重20CrMnTiH钢连铸坯和轧材的宏观碳偏析;严重的宏观碳偏析

加剧晶枝偏析

提高钢的带状组织级别并提高退火钢材正偏析区的硬度值。

Abstract

Production flow sheet for Φ130 mm round bar of steel 20CrMnTiH is 120 t BOF-LF-VD-300 mm x430 mm bloom casting-continuous rolling. Carbon macro-segregation of rolled bar and casting bloom produced by different continuous casting process (liquid supper-heating extent 15 ~30℃

electromagnetic stirring with 0-400 A) show that higher supper- heating extent and stronger mold electromagnetic stirring aggravate the carbon macro-segregation of bloom and rolled bar of steel 20CrMnTiH

and the serious carbon macro-segregation intensifies dendritic crystal segregation increases rating of banded structure of steel

and enhances hardness value of positive carbon segregation region of annealed steel products.

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